Plate 39. 



Ptychogena erythrogouon, sp. nov. 



Fig. 1. Side view of type specimen, from a colored sketch from life. 



Fig. 2. Aboral view of manubrium and radial canal in a specimen in which the gonads 

 have not yet developed. The diverticula of the aboral surface of the canal, be- 

 tween which the sexual folds later appear, are already formed, x 5. 



Fig. 3. Aboral view of radial canal and gonad (go) of adult specimen, showing the isolated 

 genital folds (go) and the distribution of the pigment, x 5. 



Fig. 4. Side view of same. From a preserved specimen, x 5. 



Fig. 5. Portion of bell margin of adult, showing marginal organs ; (t.ra) radial tentacle ; 

 (co) cordylus. X 5. 



Fig. 6. Aboral view of a specimen 18 mm. in diameter. The manubrium is relatively 

 much broader than in adult; the tentacles fewer. The radial canals as yet show 

 no diverticulae. From life. 



Fig. 7. Aboral view of manubrium of adult, showing widely open mouth, through which 

 is to be seen the junction of the four unpigmented lines which extend along the 

 aboral surfaces of the radial canals. From a preserved specimen, x 4. 



Turris fontata, sp. nov. 

 Fig. 8. Side view of type specimen, from a colored sketch from life. For details of bell 

 margin, see Plate 42. x 2.5. 



